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https://github.com/nushell/nushell.git
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Move the remainder of the plugins to crates
This commit is contained in:
102
crates/nu_plugin_tree/src/main.rs
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102
crates/nu_plugin_tree/src/main.rs
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@ -0,0 +1,102 @@
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use derive_new::new;
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use nu_errors::ShellError;
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use nu_protocol::{
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format_primitive, serve_plugin, CallInfo, Plugin, Signature, UntaggedValue, Value,
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};
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use ptree::item::StringItem;
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use ptree::output::print_tree_with;
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use ptree::print_config::PrintConfig;
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use ptree::style::{Color, Style};
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use ptree::TreeBuilder;
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#[derive(new)]
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pub struct TreeView {
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tree: StringItem,
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}
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impl TreeView {
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fn from_value_helper(value: &UntaggedValue, mut builder: &mut TreeBuilder) {
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match value {
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UntaggedValue::Primitive(p) => {
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let _ = builder.add_empty_child(format_primitive(p, None));
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}
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UntaggedValue::Row(o) => {
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for (k, v) in o.entries.iter() {
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builder = builder.begin_child(k.clone());
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Self::from_value_helper(v, builder);
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builder = builder.end_child();
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}
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}
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UntaggedValue::Table(l) => {
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for elem in l.iter() {
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Self::from_value_helper(elem, builder);
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}
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}
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_ => {}
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}
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}
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fn from_value(value: &Value) -> TreeView {
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let descs = value.data_descriptors();
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let mut tree = TreeBuilder::new("".to_string());
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let mut builder = &mut tree;
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for desc in descs {
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let value = match &value.value {
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UntaggedValue::Row(d) => d.get_data(&desc).borrow().clone(),
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_ => value.clone(),
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};
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builder = builder.begin_child(desc.clone());
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Self::from_value_helper(&value, &mut builder);
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builder = builder.end_child();
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//entries.push((desc.name.clone(), value.borrow().copy()))
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}
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TreeView::new(builder.build())
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}
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fn render_view(&self) -> Result<(), ShellError> {
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// Set up the print configuration
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let config = {
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let mut config = PrintConfig::from_env();
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config.branch = Style {
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foreground: Some(Color::Green),
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dimmed: true,
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..Style::default()
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};
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config.leaf = Style {
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bold: true,
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..Style::default()
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};
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config.indent = 4;
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config
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};
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// Print out the tree using custom formatting
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print_tree_with(&self.tree, &config)?;
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Ok(())
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}
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}
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struct TreeViewer;
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impl Plugin for TreeViewer {
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fn config(&mut self) -> Result<Signature, ShellError> {
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Ok(Signature::build("tree").desc("View the contents of the pipeline as a tree."))
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}
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fn sink(&mut self, _call_info: CallInfo, input: Vec<Value>) {
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if input.len() > 0 {
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for i in input.iter() {
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let view = TreeView::from_value(&i);
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let _ = view.render_view();
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}
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}
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}
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}
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fn main() {
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serve_plugin(&mut TreeViewer);
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}
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